Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b52ffa7103d1588…

MALICIOUS

PDF

84.6 KB Created: 2021-09-14 01:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 27052efb4ab01c6aed00a34285051015 SHA-1: a5be3e37a35b950ebbcbdad569a1b5280e37c78b SHA-256: 8b52ffa7103d1588f4b3e61974f6eb092f2c0f4cedebeca205877e6a278ccb7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised websites, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farm indicate a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://adirondackseafood.com/ckfinder/userfiles/files/33750234068.pdf In PDF document text
    • http://francescasciortino.it/userfiles/files/44759578771.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/95798596951.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/80511142370.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8ae19c66c---zusadirudesedanusokivez.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/52704021918.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/tuxuro.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/10054577039.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/fukonefevafunowexuto.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/jalav.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/340ca87f95c11b85431713a13f95a2ec/6155409568.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/64611591544.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210905102049.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/wopolex.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/63177267561.pdfIn PDF document text
    • https://anfauglir.com/images/file/72967520901.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/29855424247.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/50494718440.pdfIn PDF document text
    • https://e-midas.ro/files/file/29179051082.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/61172013217.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/bamegumopufekamukifusow.pdfIn PDF document text
    • http://byecook.com/ckupload/files/voziv.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf23d20bb1---31471450873.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/66800817239.pdfIn PDF document text
    • http://plncse.hu/php_data/file/kijidilu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373534e4b10---40838546613.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/bakeliwojidinal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=apalit+pampanga+zip+codePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 17836 bytes
SHA-256: e3a9faf095b6c1e148fb2ac088e0d0b5d5f8024da5eb6f9718fcdf65e1930867
font_01_sfnt_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C58 10632 bytes
SHA-256: 04b04067e7877509e5e1838404fdaabba529bc6d84603be576b1077a084cca5b

Open this report in the interactive analyzer, or submit your own file for analysis.